How to install a second drive?

I just received my Media Hub that has a 1 TB drive. I also ordered a 2nd 1 TB drive which will arrive tomorrow. Is it best to perform the initial installation with the 2nd new drive installed? Or is it best to do the intitial setup without the new 2nd drive and setup the 2nd drive after the first drive has been configure?

Re: How to install a second drive?

This guide suggests when installing a 2nd hard disk, the data is automatically erased form the 1st.Is this the case of just a mistake in the document?

This seems like backwards logic to me. If you have a single drive installed (linear 1 mode), adding a second drive you should be able to select "RAID1" or continue with "linear 1" without erasing the first disk. Only if you selected "linear 2" would the 1st disk need to be erased.